libvirt: Remove dated docstring
libvirt: Remove dated docstring

The docstring is out of date, we can update it or remove it.
The libvirt_opts includes all the details, so remove it.

Change-Id: Ia903ff71509b4228faf0580893c4720b5d8b9c61

jianghuaw/nova,dawnpower/nova,tudorvio/nova,nikesh-mahalka/nova,JianyuWang/nova,double12gzh/nova,jianghuaw/nova,belmiromoreira/nova,blueboxgroup/nova,felixma/nova,zaina/nova,vmturbo/nova,affo/nova,MountainWei/nova,eayunstack/nova,whitepages/nova,zhimin711/nova,tangfeixiong/nova,cernops/nova,JioCloud/nova,saleemjaveds/https-github.com-openstack-nova,openstack/nova,projectcalico/calico-nova,TwinkleChawla/nova,sebrandon1/nova,jianghuaw/nova,angdraug/nova,cloudbase/nova-virtualbox,Stavitsky/nova,raildo/nova,vmturbo/nova,CCI-MOC/nova,adelina-t/nova,badock/nova,alaski/nova,CEG-FYP-OpenStack/scheduler,openstack/nova,edulramirez/nova,alvarolopez/nova,TwinkleChawla/nova,bgxavier/nova,virtualopensystems/nova,eonpatapon/nova,apporc/nova,cernops/nova,iuliat/nova,Francis-Liu/animated-broccoli,alvarolopez/nova,devendermishrajio/nova,cernops/nova,devendermishrajio/nova_test_latest,Yusuke1987/openstack_template,redhat-openstack/nova,zzicewind/nova,varunarya10/nova_test_latest,tianweizhang/nova,dims/nova,mikalstill/nova,BeyondTheClouds/nova,barnsnake351/nova,j-carpentier/nova,mikalstill/nova,alexandrucoman/vbox-nova-driver,adelina-t/nova,angdraug/nova,rajalokan/nova,orbitfp7/nova,raildo/nova,viggates/nova,JioCloud/nova_test_latest,joker946/nova,jeffrey4l/nova,MountainWei/nova,yatinkumbhare/openstack-nova,tangfeixiong/nova,akash1808/nova_test_latest,NeCTAR-RC/nova,shail2810/nova,maelnor/nova,yosshy/nova,takeshineshiro/nova,tealover/nova,vmturbo/nova,CEG-FYP-OpenStack/scheduler,JioCloud/nova,whitepages/nova,silenceli/nova,viggates/nova,bigswitch/nova,mgagne/nova,klmitch/nova,ted-gould/nova,NeCTAR-RC/nova,yosshy/nova,akash1808/nova,gooddata/openstack-nova,fnordahl/nova,rahulunair/nova,felixma/nova,vladikr/nova_drafts,zhimin711/nova,cloudbase/nova-virtualbox,akash1808/nova,ted-gould/nova,klmitch/nova,gooddata/openstack-nova,noironetworks/nova,iuliat/nova,kimjaejoong/nova,hanlind/nova,hanlind/nova,rahulunair/nova,vmturbo/nova,isyippee/nova,scripnichenko/nova,isyippee/nova,blueboxgroup/nova,klmitch/nova,cloudbase/nova,devendermishrajio/nova_test_latest,BeyondTheClouds/nova,tudorvio/nova,berrange/nova,virtualopensystems/nova,hanlind/nova,JianyuWang/nova,rajalokan/nova,LoHChina/nova,mgagne/nova,tealover/nova,Metaswitch/calico-nova,Metaswitch/calico-nova,BeyondTheClouds/nova,zaina/nova,berrange/nova,klmitch/nova,redhat-openstack/nova,mahak/nova,cyx1231st/nova,Tehsmash/nova,mikalstill/nova,Juniper/nova,noironetworks/nova,edulramirez/nova,CloudServer/nova,mmnelemane/nova,eonpatapon/nova,petrutlucian94/nova,double12gzh/nova,CCI-MOC/nova,affo/nova,Juniper/nova,dims/nova,Tehsmash/nova,jeffrey4l/nova,rajalokan/nova,ruslanloman/nova,j-carpentier/nova,Yusuke1987/openstack_template,bgxavier/nova,Francis-Liu/animated-broccoli,fnordahl/nova,phenoxim/nova,devendermishrajio/nova,dawnpower/nova,openstack/nova,watonyweng/nova,shail2810/nova,cyx1231st/nova,sebrandon1/nova,ruslanloman/nova,kimjaejoong/nova,rajalokan/nova,yatinkumbhare/openstack-nova,gooddata/openstack-nova,alaski/nova,thomasem/nova,takeshineshiro/nova,jianghuaw/nova,bigswitch/nova,Juniper/nova,eayunstack/nova,mandeepdhami/nova,cloudbase/nova,tianweizhang/nova,CloudServer/nova,joker946/nova,badock/nova,varunarya10/nova_test_latest,sebrandon1/nova,projectcalico/calico-nova,LoHChina/nova,akash1808/nova_test_latest,cloudbase/nova,saleemjaveds/https-github.com-openstack-nova,mmnelemane/nova,gooddata/openstack-nova,alexandrucoman/vbox-nova-driver,Juniper/nova,nikesh-mahalka/nova,watonyweng/nova,silenceli/nova,belmiromoreira/nova,JioCloud/nova_test_latest,scripnichenko/nova,Stavitsky/nova,mandeepdhami/nova,phenoxim/nova,orbitfp7/nova,barnsnake351/nova,apporc/nova,maelnor/nova,mahak/nova,petrutlucian94/nova,vladikr/nova_drafts,thomasem/nova,mahak/nova,rahulunair/nova,zzicewind/nova